Live San Juan Weather

Puerto Rico’s tropical climate is one of the best things about visiting San Juan on a cruise. Warm temperatures, steady trade winds, and plenty of sunshine make it an ideal year-round port of call. This guide gives you everything you need to know about Puerto Rico’s weather so you can plan the perfect port day in Old San Juan.

Detailed San Juan Forecast & Island Map

The interactive map below shows current temperatures across Puerto Rico along with an hourly forecast for San Juan. Use the controls to switch layers (temperature, wind, rain, clouds, hurricane tracking) and timeline through the next several days.

Puerto Rico Climate Overview

Puerto Rico enjoys a tropical marine climate with warm temperatures year-round. Daytime highs in San Juan typically range from the upper 70s in winter to the upper 80s in summer (°F), while nighttime lows rarely dip below the upper 60s. Ocean temperatures stay swim-friendly all year, averaging 77°F in winter and 84°F in summer.

Trade winds blowing from the east provide a near-constant cooling breeze along the coast, making even the warmest days feel comfortable in the shade. Humidity averages 70–80%, which is noticeable but rarely oppressive thanks to the breeze.

Weather by Season

Winter (December – March)

This is peak cruise season and the most pleasant time to visit. Expect highs around 80–85°F, lows around 70°F, low humidity, and minimal rainfall. Skies are generally clear with steady trade winds. Pack light layers for cooler evenings.

Spring (April – May)

Temperatures begin climbing into the mid-to-upper 80s. Rainfall is still relatively low and the weather remains excellent for port days. Crowds thin out compared to peak winter season.

Summer (June – August)

Hot and humid with highs in the upper 80s to low 90s. Brief afternoon showers are common but usually pass quickly. This is also the start of hurricane season, though significant storms are less common in early summer.

Fall (September – November)

The wettest months, with September and October seeing the most rainfall. This is also the peak of hurricane season. Temperatures stay warm, but storms can disrupt cruise itineraries.

Hurricane Season in Puerto Rico

The Atlantic hurricane season runs from June 1 through November 30, with peak activity typically from mid-August through late October. While most cruise visits during hurricane season proceed without issue, it’s wise to monitor the forecast as your sail date approaches.

Cruise lines actively track storms and will reroute ships to avoid bad weather. If a hurricane threatens Puerto Rico, your cruise may skip San Juan or substitute another port. Consider travel insurance for fall sailings.

Best Time to Cruise to Puerto Rico

The ideal months for a San Juan port day are December through April. You’ll get warm sunny days, lower humidity, minimal rain, and virtually no hurricane risk. May and early June are also excellent and tend to be less crowded.

What to Pack for a Port Day

• Lightweight, breathable clothing (cotton or linen)
• Comfortable walking shoes — the cobblestone streets of Old San Juan demand it
• Sunscreen (SPF 30+) and reapply often
• Wide-brimmed hat and sunglasses
• Compact umbrella or light rain jacket (especially summer/fall)
• Refillable water bottle to stay hydrated
• Light layer for air-conditioned restaurants and shops

Quick Weather Tips for Cruisers

• Start your port day early to beat the midday heat
• Afternoon showers in summer usually pass within 15–30 minutes — duck into a café and wait it out
• Trade winds are stronger along the north coast — plan accordingly if you’re prone to sunburn
• Check the Windy map above before disembarking for real-time conditions